Defensive publication

ABSTRACT

AN IMPROVED DIELECTRIC PROTECTIVE BARRIER FOR ELECTRICAL CONDUCTIVE WIRE AND CABLE IS PROVIDED BY A STRIATED FILM OF A PLASTIC MATERIAL HAVING HIGH DIELECTRIC STRENGTH. PREFERRED PLASTIC MATERIALS ARE POLYTHLENE TEREPHITHALATE AND POLYPROPLENE. THE STRIATED FILM ACTS AS AN IMPROVED THERMAL INSULATOR BECAUSE OF THE NATURAL INSULATING EFFECT OF THE POLMER AND ALSO DUE TO THE ENTRAPMENT OF AIR BETWEEN THE RAISED RIBS OF THE FILM. DURING PERIODS OF OVER POTENTIAL ON THE WIRE CONDUCTORS THE BARRIER SHEETS HELPS TO PREVENT A DIELECTRIC FAILURE OF THE INSULATION ON THE CONDUCTORS.

DEFENSIVE PUBLICATION UNITED STATES PATENT OFFICE Yublished at therequest of the applicant or owner in accordance with the Notice of Dec.16, 1969, 869 0.6. 687. The abstracts of Defensive Publicationapplications are identified by distinctly numbered series and arearranged chronologically. The heading of each abstract indicates thenumber of pages of specification, including claims and sheets ofdrawings contained in the application as originally filed. The flies ofthese applications are available to the public-tor inspection andreproduction may be purchased for 30 cents a sheet.

Defensive Publication applications have not been examined as to themerits o! alleged invention. The Pptent Oilice makes no assertion as tothe novelty of the disclosed subject matter;

PUBLISHED MARCH 28, 1972 T896,052 WIRE AND CABLE WRAPPING MATERIALGerald H. Zimmerman, Claymont, Del., assignor to Hercules Incorporated,Wilmington, Del. Filed Dec. 4, 1970, Ser. No. 95,228 Int. Cl. 1332b 3/00US. Cl. 161-123 1 Sheet Drawing. 5 Pages Specification

